Iryna Yaryhina: Organ-on-a-Chip for Bone Metastasis – Moving Beyond Animal Models 

Iryna Yaryhina, Research Engineer at Pharmaceutical company «Zdorovye», shared a post on LinkedIn:

“Organ-on-a-Chip for Bone Metastasis: Moving Beyond Animal Models 

Bone is one of the most common metastatic sites in breast cancer, yet studying tumor-bone interactions remains challenging. Traditional mouse models often fail to fully recapitulate human bone physiology and show poor predictive power for drug responses.

In a recent Acta Biomaterialia study,
“Multi-omics qualification of an organ-on-a-chip model of osteolytic bone metastasis,” Natalia Muñoz Castro, Joanne Nolan, Eleni Maniati and colleagues developed a tri-culture organ-on-a-chip model that reconstructs the metastatic bone microenvironment.

The system combines breast cancer cells, osteocytes, and osteoclasts within a microfluidic chip, enabling the study of tumor–bone interactions in a controlled 3D environment.

 Key highlights:

1.  Tri-culture architecture matters.
   When osteocytes and osteoclasts were both present, cancer cell invasion increased significantly compared with chips containing only one bone cell type.
2.  Synergistic signaling drives metastasis.
   Co-culture induced strong upregulation of cytokines such as IL-6, TNF-α, MCP-1, and VEGF, reflecting inflammatory signaling observed in metastatic niches.
3.  Transcriptomic validation against in vivo models.
   RNA-seq showed that the tri-culture chip clustered closely with bone metastatic tissue from mouse models, confirming biological relevance.
4.  Shared molecular pathways were identified.
   Upregulated processes included calcium signaling and cation transport, while pathways related to ribosome biogenesis and DNA metabolism were downregulated.
5.  Multi-omics enables deeper mechanistic insight.
   Combining cytokine profiling, imaging, and RNA-seq revealed potential targets involved in osteoclast activation, tumor invasion, and bone degradation.

According to the authors, such validated organ-on-chip platforms could serve as scalable alternatives to animal models, enabling more predictive preclinical testing and improved understanding of metastatic microenvironments.

What role do you think organ-on-chip models will play in replacing animal models in oncology research?”

Title: Multi-omics qualification of an organ-on-a-chip model of osteolytic bone metastasis

Authors: Natalia Munoz Castro, Joanne Nolan, Eleni Maniati, Ayushi Agrawal, Valentine Gauthier, Oliver M.T. Pearce, Stefaan W. Verbruggen, Martin M. Knight

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